DDR2 IP Qusetion

Hello

I recently used Quartus13.0 to create DDR2 IP. I would like to ask the following questions.

Q1 :

I used MegaWizard Plug-In Manager to create a DDR2 Controller (as shown below). Do I need to pay for the use of this IP?

Q2:

Can the purpose of creating this IP be understood as the communication interface between FPGA and external DDR2?

Q3 :

The following picture shows the instantiated DDR2 IP. Is the subsequent control for data transmission and storage primarily handled by ddr2_ip_example_driver (without modifying ddr2_ip_inst)?